in chemistry, why must you never take the mass of a hot object?

Question

i'm working on a chemistry lab and this is one of the questions we have to answer, but i'm not sure why you wouldn't take the mass of a hot object.

Answer 1

A hot object creates convection in the surrounding air which can affect the accuracy of a scale.

Answer 2

The mass of an object does not change with temperature. The density does, but if you are weighing the whole object the density is irrelevant. The temperature should make no difference in the mass or weight. This sounds suspiciously like the old question "why does a dead fish weigh less than a live one?".

Answer 3

As air is warmed, the ability from the nice and cozy temperature motives the molecules of air to flow swifter and farther aside. this suggests the mass is way less dense than if the object became chilly (the position the molecules are close and compact). would also come from the very reality you do not opt for to placed any warm merchandise on a scale because it might destroy the scales (highly if utilizing a digital scale)... :)

Answer 4

The temperature affects the density not the mass (the mass stays the same) my assumption is this is a lab safety question in which it would be possibly dangerous to the scale.

Answer 5

Because as the object cools the weight changes, it gets heavier. Measure objects at room temperature

Answer 6

heat expands the object... cold will contract it, the object should be room temperature in order to get an accurate reading.

Answer 7

the hot object mass would decrease when it cools because it is contracting, which is reducing the mass.

Answer 8

because you will get burned and die!